using System;

using System.Linq;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public async static void Main()

    {

        var scheduler = new ConcurrentExclusiveSchedulerPair();

        var tasks = Enumerable.Range(0, 10).Select(i => 

            Task.Factory.StartNew(

                DoSomething,

                i,

                CancellationToken.None,

                TaskCreationOptions.DenyChildAttach,

                scheduler.ExclusiveScheduler)

        );

        await Task.WhenAll(tasks);

    }

    static void DoSomething(object obj) => Console.WriteLine($"{(int)obj}: {Thread.CurrentThread.ManagedThreadId}");

}